Electrochemical properties of ordered mesoporous carbon and its electroanalytical application for selective determination of dopamine

Jia, Nengqin; Wang, Zhiyong; Yang, Guofeng; Shen, Hujun; Zhu, Lei

doi:10.1016/j.elecom.2006.08.050

Cited by 218 publications

(128 citation statements)

References 34 publications

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“…4, they both show two characteristic bands of CNTs. The D band at 1328 cm −1 is assigned to the defects and disordered graphite structures, and the G band at 1560 cm −1 originates from the graphite band corresponding to the movement in opposite directions of the C-C bonds in graphene sheets [26,38]. Intensity ratio of defect band and graphite band (I D /I G ) is proportional to the number of defect sites in the CNT sheets.…”

Section: Electrochemical Measurementmentioning

confidence: 99%

Carbon dots-decorated multiwalled carbon nanotubes nanocomposites as a high-performance electrochemical sensor for detection of H2O2 in living cells

2016

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A novel enzyme-free hydrogen peroxide sensor composed of carbon dots (CDs) and multi-walled carbon nanotubes (MWCNTs) was prepared. It was found that the carbon dots-decorated multi-walled carbon nanotubes nanocomposites (CDs/MWCNTs) modified glassy carbon (GC) electrode (CDs/MWCNTs/GCE) exhibited a significant synergistic electrocatalytic activity towards hydrogen peroxide reduction as compared to carbon dots or multi-walled carbon nanotubes alone, and the CDs/MWCNTs/GCE has shown a low detection limit as well as excellent stability, selectivity, and reproducibility. These remarkable analytical advantages enable the practical application of CDs/MWCNTs/GCE for the real-time tracking of hydrogen peroxide (H2O2) released from human cervical cancer cells with satisfactory results. The enhanced electrochemical activity can be assigned to the edge plane-like defective sites and lattice oxygen in the CDs/MWCNTs nanocomposites due to the small amount of decoration of carbon dots on the multi-walled carbon nanotubes. Based on a facile preparation method and with good electrochemical properties, the CDs/MWCNTs nanocomposites represent a new class of carbon electrode for electrochemical sensor applications. Graphical Abstract CDs/MWCNTs exhibited good electrocatalytic activity and stability to H2O2 reduction and can be used for real-time detection of H2O2 released from living cells.

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Section: Electrochemical Measurementmentioning

confidence: 99%

Carbon dots-decorated multiwalled carbon nanotubes nanocomposites as a high-performance electrochemical sensor for detection of H2O2 in living cells

2016

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“…4c). 44 A linear regression equation was fitted for different scan rate vs. I pa (anodic peak current) which found to be I (μA) = 0.008x+0.105 (r 2 = 0.99) and I (μA) = 0.006x+0.115 (r 2 = 0.992) for I pc (cathodic peak current) of DA (Fig.…”

mentioning

confidence: 99%

Electrochemically Exfoliated Carbon Quantum Dots Modified Electrodes for Detection of Dopamine Neurotransmitter

Devi

Kumar

Sundramoorthy

2018

J. Electrochem. Soc.

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A simple electroanalytical method was developed to detect dopamine (DA) neurotransmitter by using carbon quantum dots (CQDs) modified electrode. To synthesis CQDs, a green electrochemical method was adopted and graphite rods were used as anode and cathodes in 0.1 M NaOH/ethanol (EtOH) as the electrolyte solution. As-synthesized CQD showed different particle sizes depending on the applied current with time as characterized by UV-visible spectroscopy. The particle size, lattice structure and functional groups of CQDs were analyzed by the HR-TEM, XRD and FT-IR, respectively. The CQD exhibited a green fluorescence under UV light (365 nm). Moreover, CQD dispersion was used to modify glassy carbon electrode (GCE) and screen-printed carbon electrode (SPCE) to study their electrochemical and electrocatalytic properties. The both GCE/CQD and SPCE/CQD showed higher electrocatalytic activity toward oxidation of dopamine (DA) in phosphate buffered saline (PBS) solution (pH = 7.4). In order to avoid interferences, Nafion (Nf) layer was coated on the CQD film modified electrode. The effect of scan rate on DA oxidation was studied from 10 to 150 mV/s. The calibration curve was recorded for DA from 1 to 7 μM using a SPCE/CQD and the limit of detection was found to be 0.099 μM. The observed electro-catalytic activity of the CQD was attributed to their negatively charged functional groups which attracted positively charged DA in 0.1 M PBS. In addition, detection of DA in spiked human urine sample was demonstrated with satisfactory recovery analysis.

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“…This requires understanding the complexity of the brain and its interconnectivity. In detection of neurotransmitter DA is electrochemical active on some electrode surfaces, via its oxidation, so the design of active electrodes for dopamine detection has received a great interest in electroanalysis [7][8][9] . Unfortunately, ascorbic acid (AA) and uric acid (UA) are always coexisting with DA in living organisms, sharing a similar oxidation potential so they interfere with the electrochemical detection of DA.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Electrochemical Detection of Dopamine, Ascorbic Acid and Uric Acid Using Copper-Phthalocyanine Functionalized MWCNTS

Sancy

Silva

Pavez

et al. 2013

J. Chil. Chem. Soc.

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Multiwalled carbon nanotububes functionalized with amino groups (MWCNT-NH 2) and further modified with copper-phthalocyaninetetrasulphonate (4β(SO 3 ) CuPc) were used for preparing a hybrid electrode [MWCNT-NH 2 /4β(SO 3 )CuPc/GC] using glassy carbon (GC) as a support. This hybrid electrode was tested for the detection of dopamine (DA) in the presence of ascorbic acid (AA) and uric acid (UA) in a PBS buffer solution at pH 6.8. The presence of the macrocyclic increased the resolution of the oxidation signals of AA, DA and UA into three very well distinct oxidation peaks. This effect was enhanced when the complex is adsorbed on multiwalled carbon nanotubes. In addition, the hybrid films provide a simple method for selective detection of DA, AA and UA in biological samples. The calibration curves for DA were obtained over the range of 1x10 -6 -1x10 -3M, obtaining a good selectivity and sensitivity

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Electrochemical properties of ordered mesoporous carbon and its electroanalytical application for selective determination of dopamine

Cited by 218 publications

References 34 publications

Carbon dots-decorated multiwalled carbon nanotubes nanocomposites as a high-performance electrochemical sensor for detection of H2O2 in living cells

Carbon dots-decorated multiwalled carbon nanotubes nanocomposites as a high-performance electrochemical sensor for detection of H2O2 in living cells

Electrochemically Exfoliated Carbon Quantum Dots Modified Electrodes for Detection of Dopamine Neurotransmitter

Simultaneous Electrochemical Detection of Dopamine, Ascorbic Acid and Uric Acid Using Copper-Phthalocyanine Functionalized MWCNTS

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